Article
Physics, Fluids & Plasmas
S. Kabbadj, L. Rongy, A. De Wit
Summary: When two partially miscible systems are in contact, the solubility of phase A in the other phase can be affected by chemical reactions that consume A and generate products impacting the solubility of A. This study examines the optimal conditions for the transfer of reactant A in a host phase containing species B, considering a reaction that produces a product C decreasing the solubility of A linearly. The results show that an increase in the initial concentration of reactant B or the diffusion rate of species B and C leads to a larger flux of A dissolved in the host solution, but as the influence of C on the solubility increases, the mass transfer decreases. The findings contribute to the understanding of how chemical reactions can optimize the transfer of solutes into a host phase, with potential applications in carbon dioxide sequestration in aquifers.
Article
Mechanics
B. M. Shankar, I. S. Shivakumara
Summary: The study investigates the linear stability of plane porous-Couette flow with a uniform vertical throughflow using the Brinkman-extended Darcy equation, revealing the presence of different onset modes due to the throughflow. The impacts of the throughflow dependent modified Reynolds number and the modified porous parameter on the critical values defining instability thresholds are significant. The stability characteristics of this flow in a porous medium with throughflow differ notably from cases with no throughflow and non-porous conditions.
Article
Polymer Science
Nicholas F. Mendez, Deboleena Dhara, Qingteng Zhang, Suresh Narayanan, Linda S. Schadler, Alejandro J. J. Muller, Sanat K. Kumar
Summary: X-ray photon correlation spectroscopy measurements were used to analyze the dynamics of bare and bimodal grafted silica nanoparticles mixed with PEO melts. The results showed diffusive behavior of the nanoparticles in dilute polymer nanocomposite samples, taking into account the adsorbed PEO polymer layer. The dynamics of grafted nanoparticles were found to be influenced by morphology and grafting parameters at larger scales.
Article
Astronomy & Astrophysics
D. Martinez-Gomez, B. Popescu Braileanu, E. Khomenko, P. Hunana
Summary: The ionisation degree and the interaction between charged and neutral species affect the generation and amplification of magnetic fields during instability. The collisions between fluids and the total plasma density also play a role in determining the behavior of magnetic field generation. Single-fluid models may overestimate the interaction between charged and neutral species compared to two-fluid models.
ASTRONOMY & ASTROPHYSICS
(2021)
Article
Astronomy & Astrophysics
B. Snow, A. Hillier
Summary: This paper investigates the corrugation instability in two-fluid partially ionized shock fronts through numerical simulations, finding that neutral species can stabilize the shock front under certain conditions, leading to the emergence of new features such as shock channels in the neutral species.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Computer Science, Interdisciplinary Applications
Ben Mansour Dia, Bilal Saad, Mazen Saad
Summary: The article introduces multiphase flow equations based on the non-equilibrium model, proposes a numerical simulation method using a two-step strategy, and demonstrates its advantages through experiments and numerical results.
MATHEMATICS AND COMPUTERS IN SIMULATION
(2021)
Article
Mechanics
Jun-Yu Guo, Che-Jung Cheng, Chien-Fu Chen, Yi-Ju Chou
Summary: We conducted experiments and simulations to study the formation and evolution of drops in a flow focusing microfluidic system with partially miscible two-phase fluids. The numerical model was calibrated to match experimental data and provide realistic drop dynamics. Our investigation revealed the mechanism of drop formation and a criterion for tube pattern occurrence. We also found that mass transfer at the drop interface depends on the distribution of dissolved concentration, and enhancing lateral movement in curved channels improves mass transfer.
Review
Physics, Multidisciplinary
Yu Liang, Xisheng Luo
Summary: Hydrodynamic instabilities induced by shock wave have been extensively studied in both natural and engineering systems. Recent progress in experimental, numerical, and theoretical approaches has shed light on various wave patterns and instabilities, including reverberating waves and Richtmyer-Meshkov instability. It has been shown that these instabilities can be suppressed by proper configuration of a gas layer. Further research in this area faces challenges and holds prospects for improving understanding and control of hydrodynamic instabilities.
SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
(2023)
Article
Thermodynamics
Min Chan Kim, Kwang Ho Song
Summary: In this study, the effect of co-injection of CO2 and impurities on buoyancy-driven convection in carbon capture and geological sequestration is investigated. Theoretical and numerical analyses reveal the impact of double diffusion on the onset and growth of convection, providing insights into scaling relations that can be used as control parameters. The findings suggest a new scaling relation based on the temporal change of density gradient in the double diffusive and extended double diffusive convection regimes.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Chemistry, Multidisciplinary
Muhammad Nasir, Ryuhei Yamaguchi, Yun She, Anindityo Patmonoaji, Mohammad Azis Mahardika, Weicen Wang, Zijing Li, Shintaro Matsushita, Tetsuya Suekane
Summary: Hydrodynamic fingering induced by gel formation shares common features with growing biofilms, bacterial colonies, and the instability of a confined chemical garden. This study conducted displacement experiments and developed a mathematical model to investigate the effects of gel film formation on the fingering instability of a miscible fluid system.
APPLIED SCIENCES-BASEL
(2022)
Article
Thermodynamics
Jianhua Wu, Jvyuan Duan, Xiaoyang Li, Hongyan Shi, Yanjun Du, Rui Chen, Bo Jiang, Xingbiao Zhou
Summary: The study found that both mineral oil (MO) and polyalkylene glycol (PAG) could provide sufficient oil at the minimum oil level and return to the compressor within 35 minutes in cold start-up tests. Additionally, the oil retention in the system was 3.2-3.7 g for PAG and 3.5-8.2 g for MO, indicating that both the R290/MO and R290/PAG systems showed good oil return performance.
APPLIED THERMAL ENGINEERING
(2021)
Article
Mechanics
Hamid Emami-Meybodi, Fengyuan Zhang
Summary: This study focuses on the buoyancy-driven stability analysis in a three-dimensional inclined porous medium with a capillary transition zone. The results of linear stability analysis and numerical solutions show that the inclination angle plays a crucial role in the stability of the problem.
JOURNAL OF FLUID MECHANICS
(2021)
Article
Mechanics
Mourad Echchadli, Said Aniss
Summary: In this study, we investigate the thermal convection instability in a system of two horizontal miscible liquid layers confined in a rotating Hele-Shaw cell. Depending on the buoyancy number, the centrifugal force gives rise to two convection regimes: the oscillating regime and the stratified regime. The effects of fluid layer thicknesses and the ratio of kinematic viscosities on the convection regimes are examined.
Article
Engineering, Chemical
Danielle L. de Klerk, Cara E. Schwarz
Summary: A new approach for parameterizing the NRTL model for binary liquid-liquid equilibria is introduced, which incorporates a priori knowledge into the parameterization process instead of using the usual black box approach. The method converts compositional Txx data to a set of unique binary interaction parameters, T tau tau data, and improves the parameterization of temperature-dependent parameters (TDPs) by reducing the nonlinear regression problem to a simpler linear regression. This method is less sensitive to poor initial guesses, avoids finding local minima, and significantly reduces computational requirements, while providing comparable/improved performance to published parameters. The inclusion of such information and the use of this approach will greatly simplify the parameterization of multicomponent LLE models.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Mechanics
Min Chan Kim, Satyajit Pramanik, Vandita Sharma, Manoranjan Mishra
Summary: This study analyzes the impact of the A + B -> C chemical reaction on miscible viscous fingering in a radial source flow using linear stability theory and numerical simulations. The critical instability parameters RPhys,c and RChem,c decrease with decreasing Pe for large values of Da, exhibiting power-law behavior in Pe. In the asymptotic limit of infinitely large Pe, these parameters show a power-law dependence on Pe in both linear and nonlinear regimes, with R-Chem, R-c resembling Pe(-1/2) as Pe ->infinity.
JOURNAL OF FLUID MECHANICS
(2021)
Article
Chemistry, Physical
Ylenia Miele, Stephen J. Jones, Federico Rossi, Paul A. Beales, Annette F. Taylor
Summary: The transmission of chemical signals through extracellular solution is important in cellular biological systems and lipid vesicles applications. This study investigates chemical communication in synthetic micro-and nanovesicles containing urease in a solution of urea and acid. Through experiments and simulations, it is demonstrated that the fast transport of ammonia to the external solution controls the pH-time profile and synchronizes the timing of the pH clock reaction in a heterogeneous population of vesicles. This research shows how the rate of production and emission of a small basic product controls pH changes in active vesicles with different sizes and enzyme amounts, which may have applications in bioreactors or healthcare.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Chemistry, Physical
Norbert Nemet, Ylenia Miele, Gabor Shuszter, Eszter L. Toth, Janos Endre Maroti, Peter Janos Szabo, Federico Rossi, Istvan Lagzi
Summary: In the past decade, much effort has been devoted to using chemical clock-type reactions in material design and driving self-assembly. The urea-urease enzymatic reaction has shown promising potential in material synthesis, where pH and its temporal evolution play crucial roles. In this study, we investigate the effects of zinc ions and 2-methylimidazole, reagents commonly used in zeolite imidazole framework-8 synthesis, on the urea-urease reaction. We found that both zinc ions and 2-methylimidazole inhibit the enzymatic reaction and report the formation of a hybrid urease-zinc-2-methylimidazole material. A kinetic model is developed to support the observed inhibition effect.
REACTION KINETICS MECHANISMS AND CATALYSIS
(2022)
Article
Chemistry, Physical
Szabolcs Farkas, Mate Sandor Fonyi, Gabor Hollo, Norbert Nemet, Nadia Valletti, Akos Kukovecz, Gabor Schuszter, Federico Rossi, Istvan Lagzi
Summary: Formation of periodic precipitation patterns through diffusion and reaction of transition metal cations and organic linkers was observed. The gel matrix provides optimal conditions for nucleation and crystal growth.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Review
Biology
Ylenia Miele, Gabor Hollo, Istvan Lagzi, Federico Rossi
Summary: This review summarizes recent experimental and theoretical work on the shape deformation and division of artificial cells. The composition of membranes, including permeability, elasticity, rigidity, plays a fundamental role in the stability of vesicles. The strategies used to destabilize the membranes can be divided into physical and chemical methods, which often work synergistically. The review also discusses the theoretical methods used to describe the equilibrium shapes of giant vesicles.
Article
Chemistry, Physical
Gabor Hollo, Daniel Zambo, Andras Deak, Federico Rossi, Raffaele Cucciniello, Pierandrea Lo Nostro, Hideki Nabika, Bilge Baytekin, Istvan Lagzi, Masaki Itatani
Summary: This study investigates the impact of solvent polarity on the evolving structure of Liesegang pattern (LP) using a copper chromate system in water/organic solvent mixtures. Results show that LP morphology undergoes significant changes with increasing DMSO content, leading to the formation of hierarchical patterns. The simulation model with a bimodal size distribution also aligns well with experimental findings, demonstrating the potential for tailored LP designs.
JOURNAL OF PHYSICAL CHEMISTRY B
(2022)
Editorial Material
Physics, Multidisciplinary
Istvan Lagzi, Federico Rossi, Nobuhiko Suematsu, Rabih Sultan
FRONTIERS IN PHYSICS
(2022)
Article
Biochemistry & Molecular Biology
Mert Acar, Duccio Tatini, Barry W. Ninham, Federico Rossi, Nadia Marchettini, Pierandrea Lo Nostro
Summary: This experimental study investigates the lyotropic nature of aqueous solutions of sodium halates through various measurements and evaluations. The results indicate that iodate behaves as a kosmotrope, chlorate as a chaotrope, and bromate shows an intermediate nature. The study also discusses the role of anion polarizability in the interpretation of Hofmeister phenomena.
Article
Biochemistry & Molecular Biology
Paolo Governa, Giulia Romagnoli, Paola Albanese, Federico Rossi, Fabrizio Manetti, Marco Biagi
Summary: Helicobacter pylori (HP) is a common pathogen causing infection worldwide, and oxidative stress and gastric inflammation play a role in HP-related gastric diseases. Natural products enriched with polyphenols can be used in combination with conventional antibiotics to target these factors. In this study, three propolis extracts were evaluated for their stability and bactericidal effects on HP strains, and the dark propolis extract showed the highest stability and a low minimum bactericidal concentration. Furthermore, molecular docking simulations and in vitro assays indicated that galangin and pinocembrin may inhibit the virulence factor urease.
JOURNAL OF ENZYME INHIBITION AND MEDICINAL CHEMISTRY
(2023)
Article
Engineering, Environmental
Nadia Valletti, Marcello A. Budroni, Paola Albanese, Nadia Marchettini, Margarita Sanchez-Dominguez, Istvan Lagzi, Federico Rossi
Summary: The use of surfactants can increase the removal rate of DNAPLs from groundwater and shorten the remediation process. The choice of a suitable surfactant can enhance the dissolution rate of organic pollutants. These findings can be applied in common remediation techniques.
Article
Chemistry, Physical
Sara Falsini, Adriano Intiso, Francesco Spinozzi, Sandra Ristori, Nadia Marchettini, Javier I. Garza-Arevalo, Sylvain Prevost, Margarita Sanchez-Dominguez, Federico Rossi
Summary: We studied the self-assembled aggregates of SynperonicTM 91/5 (SYN) in water solution and found that SYN exhibits peculiar aggregate packing at high concentration, making it a potential remediation agent for pollution. The results can be used to evaluate the performance of SynperonicTM products for technical tasks.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Multidisciplinary Sciences
Norbert Nemet, Hugh Shearer Lawson, Gabor Hollo, Nadia Valletti, Federico Rossi, Gabor Schuszter, Istvan Lagzi
Summary: Oscillations are an intrinsic feature of many systems, both animate and inanimate, and can be manifested as a periodic change in physical quantities such as concentration. In this study, we present a new strategy for designing a non-autonomous chemical oscillatory system by periodically changing the environment. By utilizing a precipitation reaction and the subsequent partial dissolution of the formed precipitate, we demonstrate the generation of oscillations in the turbidity of the system. Furthermore, we show that these phenomena can be used to create layered precipitation structures in a solid agarose hydrogel.
SCIENTIFIC REPORTS
(2023)
Article
Chemistry, Multidisciplinary
Masaki Itatani, Norbert Nemet, Nadia Valletti, Gabor Schuszter, Prisco Prete, Pierandrea Lo Nostro, Raffaele Cucciniello, Federico Rossi, Istvan Lagzi
Summary: Glycerol carbonate can be used as a green solvent for synthesizing metal-organic frameworks and can be reused for multiple cycles. The quality of the products obtained using glycerol carbonate is comparable to those obtained from commonly used solvents. Additionally, glycerol carbonate has a lower environmental impact compared to other solvents.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Chemistry, Physical
Nadia Valletti, Mert Acar, Raffaele Cucciniello, Claudia Magrini, Marcello A. Budroni, Duccio Tatini, Antonio Proto, Nadia Marchettini, Pierandrea Lo Nostro, Federico Rossi
Summary: Glycerol Carbonate (GC) is an emerging green reactant with high reactivity and easy synthesis from glycerol, making it attractive for many organic chemistry applications. However, the transport properties of GC, especially the diffusion coefficient in water, have been poorly studied. In this study, the diffusion coefficient of GC in water was measured for the first time, and its hydrodynamic radius and aggregate structure in aqueous solutions were investigated. The findings contribute to the understanding of GC's fate in the environment and its potential applications in aqueous media.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Chemistry, Multidisciplinary
Norbert Nemet, Gabor Hollo, Gabor Schuszter, Dezso Horvath, Agota Toth, Federico Rossi, Istvan Lagzi
Summary: Here, a time-programmed and autonomous synthesis method for zeolitic imidazole framework-8 (ZIF-8) using a methylene glycol-sulfite clock reaction was demonstrated. The induction period of the driving clock reaction, and hence the formation of ZIF-8, can be adjusted by the initial concentration of a reagent in the chemical clock. The autonomously synthesized ZIF-8 exhibited excellent morphology and crystallinity.
CHEMICAL COMMUNICATIONS
(2022)
Review
Chemistry, Multidisciplinary
Marcello A. Budroni, Federico Rossi, Laurence Rongy
Summary: This paper discusses the potential role of chemical self-organization in driving complex behaviors and the emergence of oscillatory dynamics in nonlinear chemical systems, aiming to explore chemo-hydrodynamics as a mechanism for activating self-organized structures and functional behaviors.
